MIFARE Ultralight vs ST25TV02KC

Choose MIFARE Ultralight if you need an ultra-low-cost solution for disposable applications like single-use event tickets, transit passes, or loyalty cards where cost per tag is the primary driver. It operates at 13.56 MHz on ISO 14443-A Type 2 protocol and offers 48 bytes of user-writable memory from its 64-byte total capacity. The chip provides basic security through a 7-byte UID and 32-bit one-time programmable area with per-page field-programmable read-only locking, but offers no encryption or password protection. Its NFC Forum Type 2 compatibility ensures broad smartphone readability for consumer-facing applications. The cascade level 2 implementation and simple memory structure make integration straightforward for high-volume deployments where tags are not reused and data security requirements are minimal. Choose ST25TV02KC if you require reusable tags with enhanced security features and significantly larger memory capacity. Operating at 13.56 MHz on ISO 15693 and ISO 18000-3 mode 1 protocols, it provides 256 bytes of EEPROM organized in 64 blocks of 4 bytes each—more than five times the user memory of MIFARE Ultralight. The chip includes 32-bit password protection for access control, AFI and DSFID fields for application sorting, and Electronic Article Surveillance functionality for retail anti-theft systems. The permanent Kill command allows irreversible tag deactivation for end-of-life management. This makes it suitable for asset tracking, library systems, supply chain applications, and reusable access credentials where data must be protected, updated multiple times, or selectively disabled. The ISO 15693 protocol also offers longer read ranges compared to ISO 14443-A in typical implementations.